| Kaspas Wholetrade Ltd | Hospitality | 2023 |
| KD Writing Limited | Information & communication | 2020 |
| Keep Clear Music Limited | Arts & recreation | 2006 |
| Kenwood Films Limited | Information & communication | 2019 |
| Kingdom Blue Limited | Financial services | 2025 |
| Klangrock Limited | Arts & recreation | 2026 |
| Klangrock Touring LLP | | 2026 |
| Knoxsongs Limited | Information & communication | 2013 |
| Kokoroko Touring LLP | | 2021 |
| Konichiwa Records UK LLP | | 2007 |
| Koteri World LLP | | 2023 |
| Kumi Consulting Ltd | Professional & scientific | 2014 |
| L'Roix Limited | Information & communication | 2021 |
| Leman Employment Ltd | Financial services | 2020 |
| Leon Writing Limited | Information & communication | 2020 |
| Lescott Property Limited | Real estate | 2016 |
| Lidgate Live LLP | | 2024 |
| Life IS Better in the Round Ltd | Arts & recreation | 2025 |
| Lissons LLP | | 2021 |
| Little Daggers Limited | Arts & recreation | 2017 |
| Little Daggers Records LLP | | 2018 |
| Little Twig Music Limited | Arts & recreation | 2025 |
| Little Youth Limited | Arts & recreation | 1996 |
| Logray Services Limited | Health & social care | 2024 |
| Lonely Cat Touring LLP | | 2019 |
| Lost Productions Limited | Arts & recreation | 1992 |
| Louise Liuyue Ltd | Wholesale & retail | 2025 |
| Love Minus Zero Music Limited | Information & communication | 2008 |
| Love Records Limited | Arts & recreation | 2007 |
| Lufthaus Ltd | Information & communication | 2021 |
| Lumerian Touring LLP | | 2025 |
| Lusaint Music Ltd | Information & communication | 2024 |
| MAD Operations Entertainment LLP | | 2024 |
| MAD Operations Ltd | Arts & recreation | 2020 |
| Maison Roux Wellness Ltd | Education | 2026 |
| Major Toms Publishing Limited | Information & communication | 2017 |
| Major Toms Records Ltd | Information & communication | 2015 |
| Malaa Music Ltd | Arts & recreation | 2018 |
| Manifest Music Ltd | Arts & recreation | 2021 |
| Manifest Music Management Ltd | Professional & scientific | 2023 |
| Manifest Music Ventures Ltd | Information & communication | 2022 |
| Merrygold Entertainment LLP | | 2025 |
| Mezo Limited | Hospitality | 2009 |
| MFK Accountants London Ltd | Professional & scientific | 2024 |
| Mindset Technologies Ltd | Information & communication | 2017 |
| Minotaur MAN Limited | Administrative & support | 2010 |
| Moat House Publishing Ltd | Information & communication | 2019 |
| Moderbolaget Limited | Information & communication | 2016 |
| Monkey GOD Records Limited | Manufacturing | 2010 |
| Monowise Limited | Other services | 1979 |
| Monstervpn Ltd | Information & communication | 2025 |
| Moretti & Restall Ltd | Hospitality | 2019 |
| Morgan Mckinley Group Limited | Administrative & support | 1995 |
| Mowalola Ltd | Professional & scientific | 2018 |
| MSO Enterprise Ltd | Real estate | 2018 |
| Music Code Limited | Information & communication | 2002 |
| My Life Story Film Limited | Information & communication | 2016 |
| MYB ENT Ltd | Arts & recreation | 2018 |
| MYB Touring LLP | | 2024 |
| Naeem Traders Ltd | Wholesale & retail | 2025 |
| National Housing Federation Investments Limited | Financial services | 2000 |
| Nestwise Acquisitions Ltd | Professional & scientific | 2025 |
| New Alias Limited | Information & communication | 2023 |
| New Civilization Limited | Arts & recreation | 2017 |
| New Reign Distribution Limited | Information & communication | 2016 |
| New Reign Productions Limited | Information & communication | 2014 |
| New Reign Publishing Limited | Information & communication | 2017 |
| New Reign Records Limited | Information & communication | 2017 |
| Nexthaus Ltd | Real estate | 2025 |
| Nightingale Touring LLP | | 2014 |
| Nine Three Live LLP | | 2026 |
| NO Guidnce LLP | | 2023 |
| NO Time to Waste Consultancy Ltd | Professional & scientific | 2023 |
| Nopen Music Limited | Information & communication | 2014 |
| Nothing BUT Thieves LLP | | 2016 |
| NPA Management Limited | Professional & scientific | 2017 |
| Nujum AL Arab Company Ltd | Wholesale & retail | 2025 |
| Nutty Sounds Touring LLP | | 2012 |
| October Tenth UK Limited | Administrative & support | 2023 |
| Oddyssey Music Group Limited | Information & communication | 2024 |
| OF the Chosen LLP | | 2018 |
| Offspring Enterprises Limited | Agriculture & fishing | 2020 |
| One Matter Group Infrastructure Limited | Construction | 2025 |
| Only US Holdings Ltd | Financial services | 2025 |
| Opeth Limited | Information & communication | 2003 |
| Orbit Culture Touring LLP | | 2024 |
| OUR House (UK) Productions Limited | Arts & recreation | 2004 |
| Paloma Faith Limited | Arts & recreation | 2009 |
| Paloma Faith Touring LLP | | 2024 |
| Panah Traders Ltd | Wholesale & retail | 2025 |
| Paolo Scimone Consulting Ltd | Professional & scientific | 2023 |
| Papastrello Limited | Arts & recreation | 2012 |
| Papastrello Touring LLP | | 2024 |
| Parisi Brothers Limited | Professional & scientific | 2017 |
| Parisi Touring LLP | | 2024 |
| Pedigree Picassa Limited | Arts & recreation | 2016 |
| Pellow LLP | | 2024 |
| Pentreath & Hall Limited | Wholesale & retail | 2013 |
| Perfect Stranger Ltd | Information & communication | 2016 |
| Peritorum Ltd | Education | 2013 |